%0 Journal Article %T EFFICIENCY OF M:N MATCHING IN CASE-CONTROL STUDIES
%J 科学通报(英文版) %D 1988 %I %U http://www.alljournals.cn/get_abstract_url.aspx?pcid=01BA20E8BA813E1908F3698710BBFEFEE816345F465FEBA5&cid=96E6E851B5104576C2DD9FC1FBCB69EF&jid=DD6615BC9D2CFCE0B6F945E8D5314523&aid=02BB1E08F5AB9A6392F24062284E3763&yid=0702FE8EC3581E51&vid=27746BCEEE58E9DC&iid=708DD6B15D2464E8&sid=7EEA6F8DDD9FAD6E&eid=7EEA6F8DDD9FAD6E&journal_id=1001-6538&journal_name=科学通报(英文版)&referenced_num=0&reference_num=0